a) a government made of people that made it their live's mission to get into politics for whatever reason, who are not specialised in their fields, not particularly intelligent, who take money from corporations, and who have their own agendas or b) a selection of the best minds and experts in their own fields who also pass other tests to show they have a minimum "corruption index" etc. or c) members of the public randomly selected and who are forced to serve as MPs or d) something else, maybe a giant computer, just as long as it's not running Microsoft Government 2020 :-)
You are saying "Who would you like to control your totalitarian regime?", but you are forgeting the other option: That government just says the hell out of the personal lives of people, and sticks to defending the borders, printing money, building roads, and catching bank robbers! We don't need ANYONE to micromanage the lifestyles of people. This is not natural, it is not democratic, and it won't work!
If the governement really cared about your health, they would pass laws that prevented cigarette companies from putting all the unhealthy (and in many cases downright dangerous) additives in cigarettes.
I am not sure what you are saying is correct. Tobbaco nowadays contains more nicotine and more harmful checmicals that tobbaco traditionally had 500 years ago when it was introduced to Europeans... but is this because they are actively adding checmicals, or just through selective breeding over the generations has created a more extreme and unnatural version of tobbaco? I believe in many countries it would be illegal to add chemicals as an ingredient to tobbaco without listing it as so?